Redesign admin accounts index (#9340)

* Improve overview of accounts in admin UI

- Display suspended status, role, last activity and IP prominently
- Default to showing local accounts
- Default to not showing suspended accounts

* Remove unused strings

* Fix tests

* Allow filtering accounts by IP mask

config/locales/sl.yml

@@ -102,10 +102,6 @@ sl:
       moderation_notes: Opombe moderiranja
       most_recent_activity: Zadnja aktivnost
       most_recent_ip: Zadnji IP
-      order:
-        alphabetic: Po abecedi
-        most_recent: Najnovejše
-        title: Red
       promote: Spodbujanje
   remote_interaction:
     prompt: 'Želite interakcijo s tem trobom:'